EP0830518B1 - Drum brake - Google Patents

Drum brake Download PDF

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Publication number
EP0830518B1
EP0830518B1 EP96918639A EP96918639A EP0830518B1 EP 0830518 B1 EP0830518 B1 EP 0830518B1 EP 96918639 A EP96918639 A EP 96918639A EP 96918639 A EP96918639 A EP 96918639A EP 0830518 B1 EP0830518 B1 EP 0830518B1
Authority
EP
European Patent Office
Prior art keywords
pins
cover plate
pin
brake
drum brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96918639A
Other languages
German (de)
French (fr)
Other versions
EP0830518A1 (en
Inventor
Dieter Kempf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP0830518A1 publication Critical patent/EP0830518A1/en
Application granted granted Critical
Publication of EP0830518B1 publication Critical patent/EP0830518B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • F16D63/004—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00 comprising a rotor engaged both axially and radially by braking members, e.g. combined drum and disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
    • F16D65/09—Pivots or supporting members therefor
    • F16D65/091—Pivots or supporting members therefor for axially holding the segments

Definitions

  • the invention relates to a drum brake for motor vehicles according to the preamble of claim 1.
  • GB-A-2 155 127 is a drum brake with brake shoes attached to a carrier plate by means of pins known, being between each pin and the carrier plate a sleeve-like stop element is arranged, through which the pin extends.
  • the stop element serves with its sleeve-like inside of the drum brake extending section as a mechanical Stop for the parking brake lever, whereby the Swing range of the parking brake lever limited on one side becomes.
  • a disadvantage with such an arrangement insufficient fastening or positioning in individual cases the pins on the carrier plate. Especially when investing the parking brake lever under tension on the stop element, can both the stop element and the Pin be moved from their intended position to what restrict the required freedom of movement of the brake shoes can.
  • the object of the invention is a known drum brake regarding the attachment of the pins to the cover plate improve so that especially those caused by corrosion Disadvantages are avoided.
  • the solution to the problem arises from the characteristic Part of claim 1.
  • a plastic part between cover plate and pins to be arranged which prevents direct metallic contact and because of its shape optimal for attachment the pens are suitable.
  • the arrangement according to the invention has the advantage that electrochemical corrosion in particular between different metals due to the insulating Effect of the plastic parts no longer occur can.
  • the opening of the Provide plastic part with an elongated cross section and the pin also has an elongated end portion Cross section on which can be inserted through the opening and can be locked with a rotation of 90 °. Thereby the pin can be snapped onto the holding element and mounted in a simple manner.
  • the safe Attachment of the pin can still be improved by the plastic part has U-shaped recesses into which the end portion of the pin is clickable.
  • the holes have Cover plate parallel edges on which side tabs the plastic part are snapped into place.
  • This Arrangement allows a pre-assembly of the plastic parts on Cover plate.
  • the plastic parts are with the locking lugs on Cover plate held securely even when the pins are not yet installed. Even when changing the brake shoes, if the pins need to be loosened, the plastic parts can do not fall out and get lost.
  • Another advantage of the invention is that the plastic parts differ in the axial direction of the pins can be thick, so the effective length of the pins to change in relation to the brake shoes. So that can especially with the same springs, different strengths Pressure forces for the brake shoes are generated.
  • the drum brake shown has a brake rotor 1 with a drum section 2, on the inside of the brake shoes 3rd are pressable.
  • the brake shoes 3 have a friction lining 4 and a web 5, which is used to fasten the brake shoes 3 and serves to press them onto the drum section 2.
  • For Attachment of the brake shoes 3 each have the webs 5 Mounting hole 6 on.
  • a pin 7 protrudes through the mounting hole 6 and by a spring 8 on the the vehicle opposite side of the web 5 is arranged.
  • the spring 8 lies with one end 9 on the web 5 and with its other End 10 on a disc 11 to which the pin 7 is attached is.
  • the cover plate on the inside of the drum brake 12 arranged to protect the brake parts from Dirt and splash water serves.
  • the cover plate has two Holes 13, in each of which a plastic part 14 is clipped is.
  • the plastic part 14 is continuous Opening 15 provided an elongated cross section has and through which the pin 7 protrudes.
  • One of the Endo cut 16 of the pin 7 facing the inside of the vehicle also has an elongated cross section through the opening 15 can be pushed through and by rotating it 90 'is lockable.
  • the plastic part 14 is still with U-shaped recesses 17 are provided, in which the end section 16 of the pin 7 can be locked.
  • the holes 13 are opposite arranged parallel edges provided which side tabs 18, 19 of the plastic part 14 can be snapped into place are.
  • the tabs 18, 19 have for this purpose each have a locking lug 20 behind the edges of the hole 13 to grab.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Description

Die Erfindung betrifft eine Trommelbremse für Kraftfahrzeuge gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a drum brake for motor vehicles according to the preamble of claim 1.

Bei einer aus der US 3,850,266 bekannten Trommelbremse sind die Bremsbacken mittels achsparallele Stifte an einem auf der Fahrzeuginnenseite angeordneten Abdeckblech befestigt. Die Stifte ragen durch Löcher des Abdeckblechs und durch Löcher in den Stegen der Bremsbacken, wobei die Bremsbacken durch Federn axial vorgespannt und senkrecht zur Richtung der Stifte beweglich gehalten sind, um ein Zuspannen der Bremsbacken in radialer Richtung nach außen zum Andruck an die Bremstrommel zu ermöglichen. Außerdem erlaubt diese Befestigung auch eine Bewegung der Bremsbacken in Umfangsrichtung. Nachteilig kann bei der bekannten Trommelbremse an den Enden der Stifte, die das Abdeckblech berühren und dort beweglich sind, Korrosion auftreten, insbesondere wenn verschiedene Metalle aufeinander treffen, beispielsweise wenn die Stifte aus Eisen und das Abdeckblech aus Aluminium bestehen.In a drum brake known from US 3,850,266 the brake shoes on one by means of axially parallel pins the cover plate arranged inside the vehicle attached. The pins protrude through holes in the cover plate and through Holes in the webs of the brake shoes, the brake shoes axially biased by springs and perpendicular to the direction the pins are kept movable in order to clamp the Brake shoes in the radial direction to the outside for pressure to enable the brake drum. This attachment also allows also a movement of the brake shoes in the circumferential direction. A disadvantage of the known drum brake to the Ends of the pins that touch the cover plate and are movable there corrosion, especially when different Metals meet, for example if the pins are made of iron and the cover plate is made of aluminum.

Darüber hinaus ist aus der GB-A-2 155 127 eine Trommelbremse mit mittels Stiften an einem Trägerblech befestigten Bremsbacken bekannt, wobei zwischen jedem Stift und dem Trägerblech ein hülsenartiges Anschlagelement angeordnet ist, durch das hindurch sich der Stift erstreckt. Das Anschlagelement dient dabei mit seinem hülsenartig sich in das Innere der Trommelbremse erstreckenden Abschnitt als mechanischer Anschlag für den Feststellbremshebel, wodurch der Schwenkbereich des Feststellbremshebels einseitig begrenzt wird. Als nachteilig bei einer derartigen Anordnung erweist sich die in Einzelfällen unzureichende Befestigung bzw. Positionierung der Stifte am Trägerblech. Insbeondere bei Anlage des Feststellbremshebels unter Vorspannung am Anschlagelement, können sowohl das Anschlagelement als auch der Stift aus ihrer vorgesehenen Position verschoben werden, was die erforderliche Bewegungsfreiheit der Bremsbacken einschränken kann.In addition, GB-A-2 155 127 is a drum brake with brake shoes attached to a carrier plate by means of pins known, being between each pin and the carrier plate a sleeve-like stop element is arranged, through which the pin extends. The stop element serves with its sleeve-like inside of the drum brake extending section as a mechanical Stop for the parking brake lever, whereby the Swing range of the parking brake lever limited on one side becomes. A disadvantage with such an arrangement insufficient fastening or positioning in individual cases the pins on the carrier plate. Especially when investing the parking brake lever under tension on the stop element, can both the stop element and the Pin be moved from their intended position to what restrict the required freedom of movement of the brake shoes can.

Aufgabe der Erfindung ist es, eine bekannte Trommelbremse hinsichtlich der Befestigung der Stifte am Abdeckblech zu verbessern, so daß insbesondere die durch Korrosion bedingten Nachteile vermieden werden.The object of the invention is a known drum brake regarding the attachment of the pins to the cover plate improve so that especially those caused by corrosion Disadvantages are avoided.

Die Lösung der Aufgabe ergibt sich aus dem kennzeichnenden Teil des Patentanspruchs 1. Im Prinzip besteht die Lösung darin, ein Kunststoffteil zwischen Abdeckblech und Stiften anzuordnen, das den direkten metallischen Kontakt verhindert und aufgrund seiner Formgebung optimal für die Befestigung der Stifte geeignet ist. Die erfindungsgemäße Anordnung hat den Vorteil, daß elektrochemisch bedingte Korrosion insbesondere zwischen verschiedenen Metallen aufgrund der isolierenden Wirkung der Kunststoffteile nicht mehr auftreten kann. Dabei ist die Öffnung des Kunststoffteiles mit einem länglichen Querschnitt versehen und der Stift weist ebenfalls einen Endabschnitt mit länglichem Querschnitt auf, der durch die Öffnung hindurchsteckbar und mit einer Drehung um 90° verriegelbar ist. Dadurch ist der Stift am Halteelement einrastbar und auf einfache Weise montierbar.The solution to the problem arises from the characteristic Part of claim 1. In principle there is a solution in it, a plastic part between cover plate and pins to be arranged, which prevents direct metallic contact and because of its shape optimal for attachment the pens are suitable. The arrangement according to the invention has the advantage that electrochemical corrosion in particular between different metals due to the insulating Effect of the plastic parts no longer occur can. The opening of the Provide plastic part with an elongated cross section and the pin also has an elongated end portion Cross section on which can be inserted through the opening and can be locked with a rotation of 90 °. Thereby the pin can be snapped onto the holding element and mounted in a simple manner.

In einer bevorzugten Ausführungsform kann die sichere Befestigung des Stiftes noch verbessert werden, indem das Kunststoffteil U-förmige Ausnehmungen aufweist, in die der Endabschnitt des Stiftes einrastbar ist.In a preferred embodiment, the safe Attachment of the pin can still be improved by the plastic part has U-shaped recesses into which the end portion of the pin is clickable.

In einer Weiterbildung der Erfindung besitzen die Löcher des Abdeckblechs parallele Kanten, an denen seitliche Laschen des Kunststoffteils mit Rastnasen eingerastet sind. Diese Anordnung erlaubt eine Vormontage der Kunststoffteile am Abdeckblech. Die Kunststoffteile werden mit den Rastnasen am Abdeckblech auch dann schon sicher gehalten, wenn die Stifte noch nicht montiert sind. Auch beim Wechsel der Bremsbacken, wenn die Stifte gelöst werden müssen, können die Kunststoffteile nicht herausfallen und verlorengehen.In a development of the invention, the holes have Cover plate parallel edges on which side tabs the plastic part are snapped into place. This Arrangement allows a pre-assembly of the plastic parts on Cover plate. The plastic parts are with the locking lugs on Cover plate held securely even when the pins are not yet installed. Even when changing the brake shoes, if the pins need to be loosened, the plastic parts can do not fall out and get lost.

Ein weiterer Vorteil der Erfindung besteht darin, daß man die Kunststoffteile in Axialrichtung der Stifte verschieden dick ausgestalten kann, um so die wirksame Länge der Stifte in bezug auf die Bremsbacken zu verändern. Damit können insbesondere bei gleichbleibenden Federn veschieden starke Andruckkräfte für die Bremsbacken erzeugt werden.Another advantage of the invention is that the plastic parts differ in the axial direction of the pins can be thick, so the effective length of the pins to change in relation to the brake shoes. So that can especially with the same springs, different strengths Pressure forces for the brake shoes are generated.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert.An embodiment of the invention is described below the drawings explained in more detail.

Es zeigen:

Fig. 1
eine geschnittene Teilansicht durch eine erfindungsgemäße Trommelbremse,
Fig. 2
eine teilweise geschnittene Seitenansicht eines erfindungsgemäßen Kunststoffteils,
Fig. 3
eine Draufsicht auf dasselbe Kunststoffteil,
Fig. 4
eine perspektivische Ansicht desselben Kunststoffteils.
Show it:
Fig. 1
2 shows a sectional partial view through a drum brake according to the invention,
Fig. 2
a partially sectioned side view of a plastic part according to the invention,
Fig. 3
a top view of the same plastic part,
Fig. 4
a perspective view of the same plastic part.

Die dargestellte Trommelbremse besitzt einen Bremsenrotor 1 mit einem Trommelabschnitt 2, an den von innen Bremsbacken 3 andrückbar sind. Die Bremsbacken 3 besitzen einen Reibbelag 4 und einen Steg 5, der zur Befestigung der Bremsbacken 3 und zu deren Andruck an den Trommelabschnitt 2 dient. Zur Befestigung der Bremsbacken 3 weisen die Stege 5 jeweils ein Befestigungsloch 6 auf. Ein Stift 7 ragt durch das Befestigungsloch 6 und durch eine Feder 8, die auf der dem Fahrzeug abgewandten Seite des Steges 5 angeordnet ist. Die Feder 8 liegt mit ihrem einen Ende 9 am Steg 5 und mit ihrem anderen Ende 10 an einer Scheibe 11 an, an der der Stift 7 befestigt ist. The drum brake shown has a brake rotor 1 with a drum section 2, on the inside of the brake shoes 3rd are pressable. The brake shoes 3 have a friction lining 4 and a web 5, which is used to fasten the brake shoes 3 and serves to press them onto the drum section 2. For Attachment of the brake shoes 3 each have the webs 5 Mounting hole 6 on. A pin 7 protrudes through the mounting hole 6 and by a spring 8 on the the vehicle opposite side of the web 5 is arranged. The spring 8 lies with one end 9 on the web 5 and with its other End 10 on a disc 11 to which the pin 7 is attached is.

Auf der Fahrzeuginnenseite der Trommelbremse ist ein Abdeckblech 12 angeordnet, das zum Schutz der Bremsenteile vor Schmutz und Spritzwasser dient. Das Abdeckblech besitzt zwei Löcher 13, in denen jeweils ein Kunststoffteil 14 eingeklipst ist. Das Kunststoffteil 14 ist mit einer durchgehenden Öffnung 15 versehen, die einen länglichen Querschnitt aufweist und durch die der Stift 7 hindurchragt. Ein der Fahrzeuginnenseite zugewandter Endobschnitt 16 des Stiftes 7 besitzt ebenfalls einen länglichen Querschnitt, der durch die Öffnung 15 hindurchsteckbar und mittels einer Drehung um 90' verriegelbar ist. Das Kunststoffteil 14 ist weiterhin mit U-förmigen Ausnehmungen 17 versehen, in die der Endabschnitt 16 des Stiftes 7 einrastbar ist. Zur Befestigung des Kunststoffteils 14 am Abdeckblech 12 sind die Löcher 13 mit gegenüberliegend angeordneten parallelen Kanten versehen, an denen seitliche Laschen 18,19 des Kunststoffteils 14 einrastbar sind. Die Laschen 18,19 besitzen für diesen Zweck jeweils eine Rastnase 20, die hinter die Kanten des Lochs 13 greifen.There is a cover plate on the inside of the drum brake 12 arranged to protect the brake parts from Dirt and splash water serves. The cover plate has two Holes 13, in each of which a plastic part 14 is clipped is. The plastic part 14 is continuous Opening 15 provided an elongated cross section has and through which the pin 7 protrudes. One of the Endo cut 16 of the pin 7 facing the inside of the vehicle also has an elongated cross section through the opening 15 can be pushed through and by rotating it 90 'is lockable. The plastic part 14 is still with U-shaped recesses 17 are provided, in which the end section 16 of the pin 7 can be locked. For fastening the plastic part 14 on the cover plate 12, the holes 13 are opposite arranged parallel edges provided which side tabs 18, 19 of the plastic part 14 can be snapped into place are. The tabs 18, 19 have for this purpose each have a locking lug 20 behind the edges of the hole 13 to grab.

Claims (3)

  1. Drum brake for automotive vehicles including brake shoes (3) which are attached by paraxial pins (7) to a cover plate (12) arranged on the vehicle inside, and the brake shoes (3) are biassed axially by springs (8) and mounted movably in a direction vertical to the direction of the pins (7), and including retaining elements (14) respectively mounted in a hole (13) of the cover plate (12) and having a through-opening (15) through which a pin (7) projects,
    characterized in that the retaining elements (14) which are snap-fitted into the cover plate (12) for the attachment of the pins (7) therein are configured as plastic parts, in that the opening (15) of the retaining element (14) has an elongated cross-section, in that the pin (7) includes an end portion (16) with an elongated cross-section which, after insertion through the opening (15), -can be locked by a rotation about 90°, and in that the pin (7) is in snap-type engagement with the retaining element (14).
  2. Drum brake as claimed in claim 1,
    characterized in that the plastic part has U-shaped recesses (17) for locking engagement with the end portions (16) of the pins (7).
  3. Drum brake as claimed in any one of the preceding claims,
    characterized in that the holes (13) of the cover plate (12) have parallel edges for locking engagement with detents (20) on the lateral lugs (18, 19) of the plastic part (14).
EP96918639A 1995-06-03 1996-05-29 Drum brake Expired - Lifetime EP0830518B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19520440A DE19520440A1 (en) 1995-06-03 1995-06-03 drum brake
DE19520440 1995-06-03
PCT/EP1996/002306 WO1996039586A1 (en) 1995-06-03 1996-05-29 Drum brake

Publications (2)

Publication Number Publication Date
EP0830518A1 EP0830518A1 (en) 1998-03-25
EP0830518B1 true EP0830518B1 (en) 1999-08-11

Family

ID=7763623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96918639A Expired - Lifetime EP0830518B1 (en) 1995-06-03 1996-05-29 Drum brake

Country Status (5)

Country Link
EP (1) EP0830518B1 (en)
JP (1) JPH11506528A (en)
KR (1) KR19990021963A (en)
DE (2) DE19520440A1 (en)
WO (1) WO1996039586A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2401917A (en) * 2003-05-21 2004-11-24 Automotive Products Italia Hold down pin for drum brake shoe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2065335C3 (en) * 1970-11-27 1979-02-15 Alois Kober Kg, 8871 Koetz Inner shoe brake for the overrun brake system of trailers
US3850266A (en) * 1973-08-03 1974-11-26 Chrysler Corp Parking brake
DE3239455A1 (en) * 1982-10-25 1984-04-26 Deutsche Perrot-Bremse Gmbh, 6800 Mannheim HYDRAULICALLY OPERATED BRAKE, IN PARTICULAR SERVO BRAKE
GB2155127B (en) * 1983-12-29 1987-09-16 Nissin Kogyo Kk Drum brake apparatus for vehicle
DE3640888A1 (en) * 1986-11-29 1988-06-09 Daimler Benz Ag MONITORING DEVICE FOR THE COATING WEAR IN JAW BRAKES
JPS63187738U (en) * 1987-05-26 1988-12-01
DE4020539A1 (en) * 1989-07-11 1991-01-24 Volkswagen Ag Drum brake with internal brake shoes - has noise suppression through rubber elastic fastening of brake support plate

Also Published As

Publication number Publication date
DE59602728D1 (en) 1999-09-16
DE19520440A1 (en) 1996-12-05
JPH11506528A (en) 1999-06-08
EP0830518A1 (en) 1998-03-25
KR19990021963A (en) 1999-03-25
WO1996039586A1 (en) 1996-12-12

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